Writing in the latest edition of Inside Time, a prison magazine, he said that because they weren’t allowed conjugal visits, they should get sex dolls for good behaviour.

Swarez, who is at HMP Lowdham Grange, Nottinghamshire, said: ‘The trouble is, our prisons are full of young men filled with testosterone who would give their right arm for a bit of passion.

‘The frustration of this situation makes these young men restless and wanting to cause mischief.’

He pointed to the fact that some European countries allow conjugal visits, but it is unlikely that it would ever be accepted in the UK.

He added: ‘It might help to alleviate this ongoing problem and, in turn, help de-stress the wings of every establishment the length and breadth of our nation.

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‘It came about when I was watching an documentary on Channel 4 that showed grown men who live with rubber, blow-up dolls. I noticed that all of these men looked very happy and stress-free.’

He even came up with a suggestion for their design: ‘There are companies who manufacture these doll women and if this idea is taken up, everyone who purchases one can send a photo of their loved one and have the company incorporate their features into the doll.’

On top of this, he believes they would provide companionship to inmates saying they could enjoy date nights and watch soaps together or listen to music.

Swarez, of Crosby in Merseyside, was jailed for 17 years in 2012 after Liverpool Crown Court heard how he was the ‘managing director’ of a drugs gang responsible for flooding the UK with heroin and cocaine.

Swarez pocketed £1.5m from his part in the gang, but was nabbed after cops mounted a surveillance operation – with the court hearing how cops caught the gang with nearly £4m worth of drugs.

The drugs seized included 9.25kg of heroin, 8.25kg of cocaine, 12kg of amphetamine and £37,000 in cash.